Lawn-mower.



No. 648,600. Patented May I, |900. J. STAIB.

LAWN MDWER.

(Application led Aug. 19, 1899.)

[No Model.)

THE Nonms PETERS co.. Fumo-uma.. WASHNUTUH. E. c,

' NTTED STATES PATENT OEEicEe JERRY STAIR, OF PIPESTONE, MINNESOTA.

LAWN-MOWER.

SPECIFICATION forming part of Letters Patent No. 648,600, dated May 1,1900.

Application nea August 19, 189e.

T @ZZ whom, it may concern.-

Be it known that I, JERRY STAIR, a citizen of the United States,residing at Pipestone, in the county of Pipestone and State ofMinnesota, have invented a new and useful Lawn- Mower, of which thefollowing isa specification. y

This invention relates to lawn-mowers, and has for 011e object vtoprovide a device of this nature in which there will be an efficientcutting of the grassen a constant level and in which the grass as cutwill be thrown backwardly over the cutter-bars and out of the way, so asnot to interfere with the operation' of the machine by clogging theworkin g parts thereof.

A further objectA of myinvention is to provide, in combination with theabove features, a simple and reliable mechanism for reciprocating theknives in 'a manner to positively engage the grass and insure itscutting,

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar rparts .in the severalviews, Figure 1 is afront perspective viewl of a lawn-mower constructedin accordance with myinvention. Fig. 2 is a section on line 2 2 of Fig.3. Fig. 3 is a plan view of my mower. Y

Referring now to the drawings, in operating in accordance `with myinvention I provide a frame consisting of side pieces 5 and 6, which arearranged parallel and from their rear ends are extended upwardly, as at7 and 8, at an obtuse angle to the parts 5 and 6, are then curvedinwardly, as at 9 and 10, and are finally extended rearwardly, as at 10aand 11 and separated by an interspace in which is located a suitablehandle -12, secured in place in any suitable manner. Transversely of theforward ends of the sides 5 and 6 are supporting-rods 15 and 1G,arranged one above the other and separated by an interspace in which arearranged mutuallyengaging cutter-bars 17 and 18,carrying knives 19 and20, adapted for reciprocatory motion n with respect to each other upontheir respective supporting-rods. Each knife is of sub- 27, as shown.

porting-rods by means of straps 21, passed Serial No. 727,843. (Nomodel.)

over the rods and secured at their ends to the bars.

In order to'reciprocate the cutter-bars and their knives, I connect witheach bar the forward end of .au operating-lever, which lever isconnectedwith the cutter-bar by means of a pivot-pin 23, passed-through alongitudinal vside of a cross-piece 22, having its ends fixed to thesides 5 and 6 of the frame, said levers vbein g pivotallyconnected withthe cross-piece through the medium of a-common pivot-pin From thepivot-.pin 27 the levers 21E diverge rearwardly and engage and Alie onopposite sides of a second cross-piece 29, having its ends likewiseconnected with thesides of the frame; Each lever 21a has at its rear endtwo rollers 30, pivotally mounted side by side and separated byaninterspace adapted to receive the outer edge of a cavmp plate 31,which cam-plate is mounted upon a lhub fixed to the shaft 13 and isadapted to t-urn with the supporting-wheels 14 of the machine. Thecurvature of the cam-plate is such that the engaging ends of the leverswill be moved in opposite directions as the plate is rotated, resultingin a similar correlative move.- ment of the forward ends of the leversand a consequent mutual reciprocation of the cutter-bars and theirknives.

In order to hold' the knives ata constant elevation with respect v tothe ground yover which they are passed, I connect downwardly andrearwardly directed shoes 33 to the under sides of the forward ends ofthe sides 5 and 6, which shoes engage the ground and support the forwardend of the frame, with the mechanism carried thereby.

The forward ends of the sidesf and 6 are provided withupwardly-extending ears 34:, having slots 41 therein. In these slots .t1are slidably-disposed bearing-blocks 42, adapted for adjustment in theslots by means of screws 44, entering threaded openings in the blocksand the bases of the recesses. In these blocks IOO carryingradiallyextending and helicallydisposed brush-tufts 38, held at anelevation to engage the upper surfaces of the knives and brush the cutgrass rearwardly thereof to prevent clogging of the mechanism. Theroller 36 is rotated through the medium of a sprocket 37, carried at oneend of the shaft 35, and upon which is mounted a sprocketchain 39,extending to a second sprocket 40, carried by'the shaft 13`. Thus as themachine is pushed forwardly the under side of the roller 36 will moverearwardly of the cutterbar and knives and will engage the out grass andcarry it rearwardly and deposit it within the inclosure of the frame ofthe machine.

Having thus described my invention, what I claim is- In a mowing-machine, the combination with a frame comprising side pieces having their`forward ends projected upwardly, said plates extending inwardly andrearwardly and hav- ,ing a handle connected thereto, parallel rodshaving their ends fixed in the side pieces,

a chain connecting the sprocket-wheels.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two Witnesses.

JERRY STAIR.

W'itnesses:

L. R. OBER, E. T. SHIPLEY.

